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Hydraulic traction system for vehicles

a technology of hydraulic traction system and vehicle, which is applied in the direction of engine lubrication, steering gear, rotary piston engine, etc., can solve the problems of inefficiency of conventional vane-based hydraulic motor, and achieve the effect of reducing the displacement angle of the chamber and reducing the volume of the chamber swep

Inactive Publication Date: 2008-02-19
SHEVKET ALPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a hydraulic traction system for vehicles that uses a hydraulic vane motor at each wheel and equal number of identical units installed as engine driven pumps for volumetric sufficiency without excess flow while cruising. The system also includes a control system for regulating the flow and direction of hydraulic oil during operation. The hydraulic motor used in the system has no need for inlet ports, which reduces the displacement angle of chamber and increases the volume of chambers swept while the incoming oil is actually driving the vanes. The discharge ports from the chambers carry the flow to the outlet galleries without change of direction of flow, preventing turbulence and cavitations at chamber exit. The design of hydraulic motor also provides improved power and efficiency. The hydraulic traction system for vehicles is a system of hydraulic transmission of the engine power output to the wheels, eliminating the entire mechanical power train between engine and wheels of conventional transmission systems, resulting in optimum smooth drive, totally free from effects such as that of changing gears, even with automatic transmission, and displaying optimum performance of the vehicle with higher efficiency."

Problems solved by technology

However, while a vehicle of this type has been used in slower moving farm or off road vehicles, various challenges exist to provide a mainstream hydraulically driven vehicle.
Furthermore, conventional vane-based hydraulic motors are not efficient enough to provide ideal power in an economical manner.

Method used

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  • Hydraulic traction system for vehicles
  • Hydraulic traction system for vehicles
  • Hydraulic traction system for vehicles

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Embodiment Construction

[0020]Referring now to FIGS. 1A, 1B and 1C, the hydraulic motor of the present invention will now be described. The hydraulic motor is composed of a track ring 1. The track ring 1 has three internal cams 2, three outlet galleries 3, and three pairs of discharge ports 4, which discharge into the outlet galleries 3. The three pairs of discharge ports 4, are machined on both faces of track ring 1. Also o-ring seal groove 6, is machined on both faces of track ring 1. Track ring 1 has six bolt holes 5, for the assembly through bolt 17.

[0021]The unit has a rotor 7, which is a single component comprising both rotor 7 and a shaft 7a. The rotor 7 has a main oil gallery 8, extending from the non-drive end of the shaft to beyond the center of the rotor 7 far enough to feed the flow of high pressure hydraulic oil to the distribution galleries 9, of the rotor 7, and the oil passages 10, of the rotor 7. Rotor 7 also has six slots 11 for vanes and a free moving vane 12 in each slot. The shaft 7a h...

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PUM

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Abstract

A hydraulic traction system for vehicles is described. The system comprises a hydraulic vane motor mounted at each wheel of the vehicle, and equal number of identical hydraulic vane motors operated as engine driven pumps, and a control system for regulating the flow and direction of hydraulic oil during operation. The hydraulic motor is of a novel design that has a hollow non-drive shaft that accepts incoming hydraulic oil, this allows internal components of the hydraulic motor to be arranged in such a way to improve the efficiency of the hydraulic traction system.

Description

This application claims the benefit of U.S. Provisional Application No. 60 / 612,212, filed Sep. 23, 2004.FIELD OF INVENTION[0001]This invention relates to land vehicles, and more particularly to vehicles utilizing hydraulic drive motors to drive the wheels.BACKGROUND OF INVENTION[0002]Hydraulic wheel motors have been used on various automotive and non-automotive types of vehicles. In particular, hydraulically driven vehicles have achieved a fair degree of commercial success in farm vehicles.[0003]These hydraulic wheel motors are provided with a rotary member and a stationary member having a plurality of cavities for pumping hydraulic oil which periodically varies in displacement as the stationary and the rotary member move relative to one another. Hydraulic oil from an engine driven pump is supplied to the hydraulic wheel motors for propelling the vehicle.[0004]A vehicle that is solely driven by hydraulics has the advantage of eliminating mechanical drive train components such as a c...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): B60K17/30
CPCB60K7/0015F04C2/3446F16D31/06B60K17/30B60K2007/0038B60K2007/0092F04C2240/603
Inventor SHEVKET, ALPER
Owner SHEVKET ALPER
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